Reflector.



F. C. PARSCHE.

REFLECTOR.

APPLICATION FILED 001.24, 1912.

Patented May 16, 1916.

Inventor Fran/v C.' Parsce lL/Zses- M ZM? UNITED sTATEs PATENT oE-ErcE.

FRANK `C. PARSGHE, OF CHICAGO, ILLINOIS, AASSIGNOIR.v T0 F. X. PARSCHE & SON OOM- PANY, 0F CHICAGO, ILLINOIS, A CORIEORA'IION 0F ILLINOIS.

REFLECTOR To all whom it may concern.'

Beit known that I, FRANK C. PARsoHE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new. and useful Improvement in Reflectors, of. which the following is a full, clear, concise, and exact description, reference belng had t'o the accompanying drawings, forming a part of this specification. My invention relates to light reflectors and contemplates an improved article of manufacture and a process for producing it.

While it will appear that my invention is capable of many and varied uses, I shall describe it in connection with the use I particularly have in mind,-as a reflector to be hung over an incandescent lamp ork as a reflector for projecting the raysof light in a shaft, as in the case of an automobile headlight. v

The peculiar advantages of my invention are most perceptible when the reflector is used as a hanging shade in a room, since it is a fundamental and important feature of my invention, that, although a mirrored surface is provided for reflecting purposes, the reflector as a whole is translucent, so that even though the most effective downward projections of the rays are secured, the room will be lighted in general by the diffusedv rays passing through the reflecting shade. Of course, in the case of indirect lighting, the directions are reversed, but the principle is the same. A l

It is of course well known that a mirrored surface is the best reflecting surface, but heretofore it has been possiblel to employ such a surface only at the expense of the general diffused light. In other words, such reflecting surfaces were necessarily opaque, and a translucent shade or4 trans arent shade with a translucent metallic reflpecting coating, was unknown. Now, however, I provide a reflecting shade the body of which is preferably translucent, but may be transparent, and upon the interior of which a coating of a4 platinum compound is provided. This coating is permanent, does not tarnish, and constitutes a true mirrored sur face. When this shade is disposed over a lamp, the rays are reflected most effectively, and rays also pass through the platinum refleeting material and through the body of Specication of Letters Patent.

Patented May 16, 1916.

Application filed October 24, 1912. Serial No. 727,488.

the article. The reflecting material itself serves to diffuse these general rays but this diffusion is better and more even if a translucent body, as distinguished from a transparent one, is provided.

In the accompanying drawing Ishow a uted body a, of transparent glass or trans.

lucent glass, or some other translucent material, this shade being neatly shaped andl The body of the reflector may be glass or' some other vitrified material vand in the course of manufacture, I give the interior surface of the body, in ythe firstinstance, a

coating of some salt solution such as sulfate of iron and sulfate of copper, and I find it convenient lto carry this salt solution in a .quantity ofocher or Whiting merely as a carrying agent, which can be disposed upon the surface, this combination being'in the proportion of one part of salt to two parts of ocher or Whiting, by weight. With this preliminary coating, the article is fired to about 7 50 degrees Fahrenheitand the action of the salt destroys the alkalies which eXist' originally in the glass for instance and prepares the article for the reception of the reflecting material, acting itself as a flux. The salt forms a deposit on theglass to which deposit the reflecting material4 adheres.'

After this preliminary yfiring the article is thoroughly washed with Water, thus removing the ocher or Whiting and leaving the effect of the salt and some of the salt as a flux. The platinum compound (composed of fifty grams of platinum chlorid, one gram of German litharge, one gram borate of lead, and sufficient essence of lavender to make a thin paint-like mixture) is then painted on the prepared surface with a brush or in some other suitable manner, and is then fired to about 1000 degrees Fahrenheit. Several coats may be'provided and several rings may be had in order t0 get the best results.

I claim as new and desire to secure by Letters Patent:

l. The process of-l making a` reflectorl which comprises giving a body of vitrified material an interior coating of a salt, firing the body With'this preparation, Washing the body afterthe ring, then' applying a platinum compound reflecting coating, and' then firing the body with this coating.'

2. The process of making va reflector which comprises giving a body of vitrified material anl interior coating of a salt carried in a quantity ofocher or Whiting, firing the body IWith thisl preparation, Washing the body after the firing, then applying a plati-` num'compound reflecting coating, and then liring the body this coating.

. my name this 21st day of October, A. D.,

FRANK C. PARSCHE.

`Witnesses:

' LEONARD W. NovANDER,

ROBERT F. BRACKE. 

